BUILDING CONSTRUCON
ATTEMPT ALL THE BELOW
MENTIONED QUESTIONS:
1) The strength and
quality of concrete, depend upon:
a.grading of aggregates
b.surface area of
aggregates
c.shape of aggregates
d.all the above.
2) To hydrate 500 kg of
cement full water needed, is
a.100 kg
b.110 kg
c.120 kg
d.130 kg.
3) The lower water cement
ratio in concrete, introduces
a.smaller creep and
shrinkage
b.greater density and
smaller permeability
c.improved frost
resistance
d.all the above.
4) A concrete having a
slump of 6.5 cm, is said to be
a.dry
b.earth moist
c.semi-plastic
d.plastic
5) The entrained air in
concrete
a.increases workability
b.decreases workability
c.decreases resistance to
weathering
d.increases strength.
6) The increased
cohesiveness of concrete, makes it
a.less liable to
segregation
b.more liable to
segregation
c.more liable to bleeding
d.none of these.
7) After casting, an
ordinary cement concrete on drying
a.expands
b.shrinks
c.shrinks
d.none of these.
8) Concrete containing
a.silicious aggregates,
has higher coefficient of expansion
b.igneous aggregates, has
intermediate coefficient of expansion
c.lime stones, has lowest
co-efficient of expansion
d.all the above.
9) The produce impermeable
concrete
a.through mixing of
concrete is required b.proper compaction of concrete is
required
c.proper curing of
concrete is required
d.all the above.
10) Separation of coarse
aggregates from mortar during transportation, is known
a.bleeding
b.creeping
c.segregation
d.shrinkage.
11) Separation of water or
water sand cement from a freshly concrete, is known
a.bleeding
b.creeping
c.segregation
d.flooding.
7) After casting, an
ordinary cement concrete on drying
a.expands
b.shrinks
c.shrinks
d.none of these.
8) Concrete containing
a.silicious aggregates,
has higher coefficient of expansion
b.igneous aggregates, has
intermediate coefficient of expansion
c.lime stones, has lowest
co-efficient of expansion
d.all the above.
9) The produce impermeable
concrete
a.through mixing of
concrete is required b.proper compaction of concrete is
required
c.proper curing of
concrete is required
d.all the above.
10) Separation of coarse
aggregates from mortar during transportation, is known
a.bleeding
b.creeping
c.segregation
d.shrinkage.
11) Separation of water or
water sand cement from a freshly concrete, is known
a.bleeding
b.creeping
c.segregation
d.flooding.
20) For road pavements,
the cement generally used, is
a.ordinary Portland cement
b.rapid hardening cement
c.low heat cement
d.blast furnace slag
cement
21) For the construction
of thin R.C.C. structures, the type of cement to be avoided, is
a.ordinary Portland cement
b.rapid hardening cement
c.low heat cement
d.blast furnace slag
cement.
22) A concrete using an
air entrained cement
a.has strength less than
10% to 15%
b.has more resistance to
weathering
c.is more plastic and
workable
d.is free from segregation
and bleeding.
23) The commercial name of
white and coloured cement in India, is
a.colocrete
b.rainbow cement
c.silvicrete
d.all the above.
24) Percentage of
pozzolanic material containing clay upto 80% used for the manufacture of
pozzolana cement is
a.30%
b.40%
c.50%
d.60%.
25) Pick up the correct
statement from the following:
a.Calcium chloride acts as
a retarder b.Gypsum (calcium sulphate) acts as a
retarder
c.Calcium chloride acts as
an accelerator
d.both (2) and (3).
26) Vicat's apparatus is
used for
a.fineness test
b.consistency test
c.setting time test
d.soundness test.
27) The diameter of the
Vicat plunger is 10 mm and its length varies from
a.20 mm to 30 mm
b.30 mm to 40 mm
c.40 mm to 50 mm
d.50 mm to 60 mm.
28) Pick up the incorrect
statement applicable to the field test of good cement.
a.When one thrusts one's
hand into a bag of cement, one should feel warm
b.The colour of the cement
is bluish c.A handful of cement thrown in to a
bucket of water should
sink immediately
d.All the above.
29) According to IS :
382-1963, a good aggregate should be
a.chemically inert
b.sufficiently strong
c.hard and durable
d.all the above.
30) An aggregate is said
to be flaky, if it least dimension is less than
a.2/3 mean dimension
b.3/4 mean dimension
c.3/5 mean dimension
d.5/8 mean dimension
31) Sand generally
contains salt if it is obtained from:
a.nala beds
b.river beds
c.sea beds
d.all the above
32) The bulk density of
aggregates does not depend upon :
a.size and shape of
aggregates
b.specific gravity of
aggregates
c.grading of aggregates
d.size and shape of the
container.
33) The aggregate
containing moisture in pores and having its surface dry, is known as
a.moist aggregates
b.very dry aggregates
c.dry aggregates
d.saturated surface dry
aggregate.
34) Log Angels machine is
used to test the aggregate for
a.crushing strength
b.impact value
c.abrasion resistance
d.water absorption.
35) If fineness modulus of
sand is 2.5, it is graded as
a.very fine sand
b.fine sand
c.medium sand
d.coarse sand.
36) The standard sand now
a days used in India, is obtained from
a.Jaipur (Rajasthan)
b.Jullundur (Punjab)
c.Hyderabad
(AndhraPradesh)
d.Ennore (Madras)
37) Pozzolana cement is
used with confidence for construction of
a.dams
b.massive foundations
c.abutments
d.all the above.
38) Water cement ratio is
a.volume of water to that
of cement
b.weight of water to that
of cement
c.weight of concrete to
that of water
d.both (1) and (2) of the
above.
39) According to
Water-Cement Ratio Law, the strength of workable plastic concrete
a.depends upon the amount
of water used in the mix
b.does not depend upon the
quality of cement mixed with aggregates
c.does not depend upon the
quantity of cement mixed with aggregates
d.all the above.
40) Hydration of cement is
due to chemical action of water with
a.Tricalcium silicate and
dicalcium silicate b.Dicalcium silicate and tricalcium
aluminate c.Tricalcium
aluminate and tricalcium
alumino ferrite
d.All the above.
41) I.S.I. specified the
full strength of concrete after
a.7 days
b.14 days
c.21 days
d.28 days
42) High temperature
a.increases the strength
of concrete b.decreases the strength of concrete c.has no effect on the
strength of
concrete
d.none of these.
43) C.R.R.I. charts are
used to obtain a relationship between strength of concrete and
a.water cement ratio
b.workability
c.grading of aggregate
d.fineness modulus
44) Higher workability of
concrete is required if the structure is
a.made with cement
concrete
b.thick and reinforced
c.thin and heavily
reinforced
d.thick and heavily
reinforced.
45) Internal friction
between the ingredients of concrete, is decreased by using
a.less water
b.fine aggregates
c.rich mix
d.more water and coarse
aggregates.
46) Segregation is
responsible for
a.honey-combed concrete
b.porous layers in
concrete
c.surface scaling in
concrete
d.all the above.
47) The concrete mix which
causes difficulty in obtaining a smooth finish, posses
a.segregation
b.internal friction
c.hardness
d.bleeding.
48) The factor which
affects workability, is
a.water content and its
temperature
b.shape and size of the
aggregates
c.air entraining agents
d.all the above.
49) If the slump of a
concrete mix is 60 mm, its workability is
a.very low
b.low
c.medium
d.high
50) Workability of
concrete mix with low water cement ratio is determined by
a.tensile strength test
b.slump test
c.compaction factor test
d.flexural strength test.
51) Pick up the correct
statement from the following:
a.Segregation is necessary
for a workable concrete
b.Consistency does not
affect the workability of concrete
c.If the concrete mix is
dry, the slump is maximum
d.None of these.
52) Proper proportioning
of concrete, ensures
a.desired strength and
workability
b.desired durability
c.water tightness of the
structure
d.all the above.
53) For preparing a
test-specimen, it is necessary
a.to mix cement and fine
aggregate by dry hand
b.to mix coarse aggregates
c.to mix water to the cement, fine
aggregates and coarse
aggregates
d.all the above.
54) If the depth of moist
sand in a cylinder is 15 cm and the depth of the sand when fully inundated with
water is 12 cm, the bulking of the moist sand, is
a.10%
b.12%
c.15%
d.25%.
55) Ordinary concrete is
not used for concrete grade
a.M 100
b.M 150
c.M 200
d.M 400.
56) If 50 kg of fine
aggregates and 100 kg of coarse aggregates are mixed in a concrete whose water
cement ratio is 0.6, the weight of water required for harsh mix, is
a.8 kg
b.10 kg
c.12 kg
d.14 kg
57) Shrinkage in concrete
can be reduced by using
a.low water cement ratio
b.less cement in the
concrete
c.proper concrete mix
d.all the above.
58) While designing an air
entrained concrete
a.water cement ratio is
reduced b.proportion of aggregates is reduced c.an allowance for the entrained
air is
made
d.all the above.
59) An ideal ware house,
is provided
a.water proof masonry
walls b.water proof roof c.few windows which remain generally
closed
d.all the above.
60) The specifications of
a cement bag for storage, are
a.weight 50 kg
b.height 18 cm
c.plan area 3000 sq. cm
d.all the above.
61) 'Ware house pack' of
cement means
a.full capacity of the
ware house b.pressure exertion of the bags of upper
layers c.pressure
compaction of the bags on
lower layers
d.none of these.
62) To ensure constant
moisture content in aggregates
a.area of each aggregate
pile should be large
b.height of each aggregate
pile should not exceed 1.50 m
c.aggregate pile should be
left for 24 hours before aggregates are used
d.all the above.
63) The process of proper
and accurate measurement of concrete ingredients for uniformity of proportion,
is known
a.grading
b.curing
c.mixing
d.batching
64) Proper batching
ensures
a.economy
b.durability
c.workability
d.all the above.
65) The process of mixing
, transporting, placing and compacting concrete using Ordinary Port land cement
should not take more than
a.30 minutes
b.40 minutes
c.60 minutes
d.75 minutes.
66) For concreting tunnel
linings, transportation of concrete is done by
a.pans
b.wheel borrows
c.containers
d.pumps
67) The process of
hardening the concrete by keeping its surface moist is known
a.placing
b.wetting
c.curing
d.compacting
68) Curing
a.reduces the shrinkage of
concrete b.preserves the properties of concrete c.prevents the loss of water by
evaporation
d.all of the above.
69) Curing of pavements,
floors, roofs and slabs, is done by
a.membrane method
b.ponding method
c.covering surface with
bags
d.sprinkling water method.
70) Curing a concrete for
long period ensures better
a.volume stability
b.strength
c.water resistance
d.all of the above
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